Exciter Model: REXSYS

Following checks and corrections are applied during Validation and AutoCorrection.

• If 0.0 < Tr < 0.5*Mult*TimeStep then Tr = 0, ElseIf 0.5*Mult*TimeStep < Tr < Mult*TimeStep then Tr = Mult*TimeStep
• If 0 < Te < Mult*TimeStep then Te = Mult*TimeStep
• If 0.0 < Ta < 0.5*Mult*TimeStep then Ta = 0, ElseIf 0.5*Mult*TimeStep < Ta < Mult*TimeStep then Ta = Mult*TimeStep
• If 0.0 < Tp < 0.5*Mult*TimeStep then Tp = 0, ElseIf 0.5*Mult*TimeStep < Tp < Mult*TimeStep then Tp = Mult*TimeStep
• If 0.0 < Tf < 0.5*Mult*TimeStep then Tf = 0, ElseIf 0.5*Mult*TimeStep < Tf < Mult*TimeStep then Tf = Mult*TimeStep
• If 0.0 < Tf2 < 0.5*Mult*TimeStep then Tf2 = 0, ElseIf 0.5*Mult*TimeStep < Tf2 < Mult*TimeStep then Tf2 = Mult*TimeStep
• If 0.0 < Tb1 < 0.5*Mult*TimeStep then Tb1 = 0, ElseIf 0.5*Mult*TimeStep < Tb1 < Mult*TimeStep then Tb1 = Mult*TimeStep
• If 0.0 < Tb2 < 0.5*Mult*TimeStep then Tb2 = 0, ElseIf 0.5*Mult*TimeStep < Tb2 < Mult*TimeStep then Tb2 = Mult*TimeStep
• If Vrmax < Vrmin then swap the values
• If Vfmax < Vfmin then swap the values

Mult represents the user-specified value Minimum time constant size as multiple of time step option on the Validation page of the Transient Stability Dialog

TimeStep represents the integration time step being used as described on TimeStep

Following treatment is handled during the transient numerical simulation

• If Vr > Vrmax, then Vrmax = Vr or if Vr < Vrmin, then Vrmin = Vr
• If Vf > Vfmax, then Vfmax = Vf or if Vf < Vfmin, then Vfmin = Vf
• If Vi > Vimax, then Vimax = Vi or if Vi < -Vimax, then -Vimax = Vi